Bridge for traveling cranes.



S. BUCKLEY. I BRIDGE FOR TRAVELING CRANES. APPLICATION FILED JUNE 2. I917.

RENEWED JAN. 7. 1919.

Patented Mar. 11,1919.

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S. BUCKLEY.

BRIDGE FOR TRAVELING CRANES. APPLICATION FILEDIJUNEZI i9l7- RENEWED JAN 7, 1919.

578 Patented Mar. 11, 1919.

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S'. BUCKLEY.

BRIDGE FOR TRAVEUNG CRANES.

APPLICATION FILED JUNE 2, 19m. RENEWED JAN-7.1919.

Patented Mar. 11,1919.

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7 No. 149,180, filed February 17 1917 In the set forth in my aforesaid copending appli- Figure 1 is a side elevation of a crane em- .bodyingthe invention, some of the parts to By means of'a motor 13 the rope can beent invention is in some respects similar to character of the bridge construction. The

V which I now deem preferable. but it will be invention. Particularly it will be under- V gist-00d that the forms of the girders, the anism as a whole 18 represented in the-drawmeans for connecting the several girders together and the various structural details .can be varied widely in accordance with the SYDNEYBUCKLEY. OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO NILES-BEMENT- POND COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

BRIDGE FOR TRAVELING CRANE-S.

v Specification of Letters Patent. Patented Mar. 11, 1919.

Application filed June 2, 1917, Serial No. 172,424. Renewed January'i, 1919. Serial No. 270,059.

To all whom it may concern: which the invention does not directly relate Be it known that I, SYDNEY BUCKLEY, a being omitted. citizen of the United States, and a resident F'g. 2 is a transverse vertical sectional of Philadelphia, in the county of Philadelview, the part at the left being taken along phia and State of Pennsylvania, have inthe line 2-2 of Fig. 3 and the part at the vented certain new'and useful improvements right being taken along the line 2--2 of in Bridges for Traveling Cranes, of which Fig. 3. the following is a specification, reference be- Fig. 3 is a longitudinal vertical sectional ing had therein to the accompanying drawview taken along the, center line 83 of one ings. of the bridge elements.

V The'invention relates more particularly to Fig. 4 is a fragmentary plan view of one traveling cranes of the class in which each of the bridge elements, certain of the parts comprises a movable bridge having two parbeing broken away to show other parts. allelseparated elements respectively carry- Referring to the drawings, particularly ing rails. A hoisting mechanism is proto Figs. 1 and 2, it will be observed that I vided which consists of a trolley movable, have shown a crane comprising a'traveling along the rails on the bridge and depending bridge which is carried at its ends on trucks load engaging elements which usually ex- Which travel along rails 1, 1 supported on tend between the two elements of the bridge. suitable elevated structures 2, 2. The bridge The invention relates especially to the is made up of two longitudinal elements arbridge elements of cranes of the type speciranged with a space between them. The two fied, and a construction embodying my preselements are connected at the ends by suit able transverse members 3 as shown in Fig. the construction disclosed and claimed in 2. my copending application for cranes, Serial two wheeled truck element 4; for each end of each bridge element. For the purpose of moving the crane as a design of cranes, in order to meet thevawhole along the rails 1, 1, one or more truck riousand difi'erent requirements as concerns :span, capacity, character of load, operating wheels at each end of the bridge are conconditions, etc., itzis necessary to vary the nected with a suitable driving motor. As illustrated, one of the truck wheels at each object of the present invention is to provide end'is connected witha gear wheel 5 which Preferably there is provided a separate a bridge construction of the general type meshes with a pinion 6 on a shaft 7 which cation but'whichTis adapted to meetdifi'erbridge to the other. A motor 8 is provided ent requirements, for rotating the shaft 7, thus serving to .In the accompanying drawings 1- have move the bridge in one direction or the other illustrated the embodiment of the invention as required.

understood thatthe construction shown is bridge elements is a rail 9. A suitable trolintended to be merely illustrative and is not .ley or hoisting mechanism is provided which intended to define or limit the scope of the is supportedon the rails 9. 9,. and is adapted to travel along-them. The hoisting mechshapes: of the structural sections used,.the ings by 10, but as this hoisting mechanism of itself constitutes no part of the present invention, detailed description thereof can be omitted. It is suflicient to point out that requirements of any particular case or in the hoisting mechanism is provided with a accordance with the preferences of the .desuitable load-engaging device such as the signer. hook 11 which is suspended by a cable or 'Ofthe drawings: cables 12(passing through the space between the two longitudinal elements of the bridge.

extends longitudinally from one end of the- Supported on each of the said longitudinal the drawings many of the structural details are omitted or are incompletely shown, as these constitute no part of the invention and can be varied as desired.

In the construction presented in my aforesaid application Serial No. 149,180, each side element of the bridge comprises two separated main girders and a supplemental railcarrying girder located between the main girders. In the said construction'the load is transmitted to the ends of the bridge solely by the main side girders, the central railcarrying girder merely serving to support.

the rail and'to transmit the load'from one panel point to the next, the load being transferred at the panel points to the main girders; The present construction differs from the aforesaid construction primarily in the provision of three main load-carrying girders which are equally or at least commensu rateiin carrying capacity. The rail is carried by the central one of these three girders and suitable cross connections are provided at. intervals whereby the load is distributed 7 to all three of the girders. As illustrated,

the three girders are substantially the same in size and construction, but it will be understood that a certain degree of variation may be had without departing from the spirit of the invention.

Each sideelement of the bridge has two side-girders 16 and 17, and I prefer under most circumstances to'construct these girders with upper and lower longitudinal compression and tension members and suitable diagonal and upright connecting members. As shown, each girder has an upper compression member consisting of two channel "beams 18 placed back to'back and a lower tension memberconsisting of two channel beams 19 placed back to back. Positioned between'the two'pairs of channel beams of the'said upper and lower members and extending diagonally, are truss members 20 and'21 which preferably are smaller channel beams suitably connected to the channel beams 18 and 19 by gusset plates and rivets. At the ends of the bridge the upper and lower compression members of the girders are connected to suitable end; structures 22,-.22. I 1

Positioned between the two side girders 16 and 17 is a central girder 23 which is preferably similar to the side girders l6 and 17. As shown, it comprises an upper compression member consisting ofchannel beams 24 placed back to back and a lower tension member consisting of channel beams 25 placed back to back. Positioned between the two pairs of channel beams 2a and 25 of the said upper and lower members and extend ing diagonally, are truss members 26 and 27 which preferably are smaller channel beams suitablyconnected to the channel beams 24: and 25 by gusset plates andrivets. AtJ-the ends of the bridge'the upper and lower compression members of the central girder are connected to the aforesaid end structures 22, 22. Preferably at each point where two diagonal members 26 and 27 join the lower compression member there is provided an upright 28 which at its upper end is con-' nected to the upper-compression member.

Suitable transverse members are provided for connecting together all three of the girders. Preferably, in order thatthese transverse members may be suitably connected with the side girders and may suitably engage the central girder without any break therein, the central girder is positioned a little higher than the side girders. As illustrated, transverse connecting members are provided bothat the top and at the bottom. The upper connecting members comprise two channel beams 29, 29 placed back to back and the lower transverse members comprise channel beams 30, 30 placed back to back. These channel beams 29' and'30 are suitably co nnected at their ends tothe corresponding beams of the side girders and at their cen ters are connected to the under sides of the beams 24: and 25 of the central girder. The

lower connecting members are provided at each point where'the two diagonal members join the lower members, andthe upper con necting members are provided at each point where two diagonal members join the upper member. For stiffening the structure, transverse diagonal braces 31 and 32 may be provided and also horizontal diagonal braces 33 and 3 1' at the top and 35 and 36'at the botbe described as-they are well known to designers of structural steel constructions.

The rail 9 is carriedby theupper compression member of the central girder 23. This -member must be of sufficient strength toact a a beam and support the load from one set V of connecting members 29, 29 to the next vertom. The details of these braces need not ends of the bridge. Practically the only metal (outside of the small diagonal braces) which is inactive for this purpose is that in the transverse connecting members 29 and 30. These connecting members, however, can be relatively light as they do not have to carry the whole load as do the corresponding members in the construction shown in my aforesaid copending application.

lVhat I claim is:

1. The combination in a bridge for a traveling crane of six individually complete main girders extending from end to end, the girders being arranged in groups or three with those in each group equally spaced, two rails supported respectively on the central girders of the groups, and connecting members for transmitting parts of the rail loads from the central girders to the adjacent side girders.

2. A traveling crane bridge element consisting of three equally spaced individually complete main girders extending from end to end, a rail supported on the central girder, and connecting members for transmitting parts of the rail load from the central girder to the side girders.

3. A traveling crane bridge element consisting of three equally spaced individually complete main girders extending from end to end, each girder comprising an upper longitudinal compression member, a lower longitudinal tension member and diagonal truss members, a rail supported on the upper member of the central girder, and connecting members for transmitting parts of the rail load from the central girder to the side girders.

4. A traveling crane bridge element conplete main'girders extending from end to.

end and each comprising an upper longitudinal compression member, a lower longitudinal tension member and diagonal truss members, the three girders being equally spaced horizontally and the central girder being at a higher elevation than the side girders, a rail supported on the upper members of the central girder, and transverse load-carrying members connecting all three girders at each point where diagonal members join the vertical members, the said transverse members being joined horizontally to the longitudinal members of the side girders and engaging the bottoms of the longitudinal members of the central girder.

In testimony whereof, I hereto aflix my signature.

SYDNEY BUCKLEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

